Influence of Substrate Proximate Properties on Voltage Production in Microbial Fuel Cells

Mbugua, James K; Mbui, None Damaris Nduta; Mwaniki, Joseph M.; Mwaura, Francis; Sheriff, S.A.

doi:10.4236/jsbs.2020.102004

Cited by 6 publications

(2 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In Figure 2b, it is possible to observe the values of the electric current generated during the monitoring, where the values increase from 0.15959 ± 0.04933 mA (on the first day) to 1.43973 ± 0.05568 mA (on day 18), after falling by the last day (0.74929 ± 0.08208 mA). These electric current values are due to the good formation of the electrogenic biofilm, and according to Mbugua et al (2020), this is highly dependent on the carbon sources present in the substrates [36]. Likewise, it has been shown that high levels of carbohydrates serve as the main sources of carbon for microbial activity, causing the production of electrons that flow from the anodic to the cathodic electrode that generate electrical current [37,38].…”

Section: Results and Analysismentioning

confidence: 99%

Use of Tangerine Waste as Fuel for the Generation of Electric Current

et al. 2023

View full text Add to dashboard Cite

Fruit waste has increased exponentially worldwide, within which tangerine is one of those that generates a greater amount of organic waste, which is currently not fully used. On the other hand, microbial fuel cells (MFCs) are presented as an opportunity to take advantage of organic waste to generate electricity, which is why the main objective of this research is to generate bioelectricity using tangerine waste as a substrate in microbial fuel cells using zinc and copper electrodes. It was possible to generate current and voltage peaks of 1.43973 ± 0.05568 mA and 1.191 ± 0.035 V on days eighteen and seventeen, respectively, operating with an optimum pH of 4.78 ± 0.46 and with electrical conductivity of the substrate of 140.07 ± 3.51 mS/cm, while the Brix degrees gradually decreased until the last day. The internal resistance determined was 65.378 ± 1.967 Ω, while the maximum power density was 475.32 ± 24.56 mW/cm2 at a current density of 5.539 A/cm2 with a peak voltage of 1024.12 ± 25.16 mV. The bacterium (Serratia fonticola) and yeasts (Rhodotorula mucilaginosa) were identified in the substrate with an identity of 99.57 and 99.50%, respectively. Finally, the cells were connected in series, managing to generate 3.15 V, which allowed the turning on of a red LED light.

show abstract

Section: Results and Analysismentioning

confidence: 99%

Use of Tangerine Waste as Fuel for the Generation of Electric Current

et al. 2023

View full text Add to dashboard Cite

show abstract

“…In terms of the power density of the watermelon substrate, it was 0.2452 mW/cm 2 . For the papaya substrate, on the other hand, the values of dissolved oxygen (DO) and biological oxygen demand (BOD) showed that the medium was conducive to the proliferation of microorganisms [20,21]. These results demonstrated that single-chamber MFCs are capable of generating electricity from tropical fruit residues, so the use of these systems was recommended as a sustainable alternative since they represent an option to increase electricity supply in urban and rural areas [22,23].…”

Section: Introductionmentioning

confidence: 99%

Electric Current Generation by Increasing Sucrose in Papaya Waste in Microbial Fuel Cells

et al. 2022

View full text Add to dashboard Cite

The accelerated increase in energy consumption by human activity has generated an increase in the search for new energies that do not pollute the environment, due to this, microbial fuel cells are shown as a promising technology. The objective of this research was to observe the influence on the generation of bioelectricity of sucrose, with different percentages (0%, 5%, 10% and 20%), in papaya waste using microbial fuel cells (MFCs). It was possible to generate voltage and current peaks of 0.955 V and 5.079 mA for the cell with 20% sucrose, which operated at an optimal pH of 4.98 on day fifteen. In the same way, the internal resistance values of all the cells were influenced by the increase in sucrose, showing that the cell without sucrose was 0.1952 ± 0.00214 KΩ and with 20% it was 0.044306 ± 0.0014 KΩ. The maximum power density was 583.09 mW/cm2 at a current density of 407.13 A/cm2 and with a peak voltage of 910.94 mV, while phenolic compounds are the ones with the greatest presence in the FTIR (Fourier transform infrared spectroscopy) absorbance spectrum. We were able to molecularly identify the species Achromobacter xylosoxidans (99.32%), Acinetobacter bereziniae (99.93%) and Stenotrophomonas maltophilia (100%) present in the anode electrode of the MFCs. This research gives a novel use for sucrose to increase the energy values in a microbial fuel cell, improving the existing ones and generating a novel way of generating electricity that is friendly to the environment.

show abstract